Class CellCounter

A job with a a map and reduce phase to count cells in a table.
The counter lists the following stats for a given table:

1. Total number of rows in the table
2. Total number of CFs across all rows
3. Total qualifiers across all rows
4. Total occurrence of each CF
5. Total occurrence of each qualifier
6. Total number of versions of each qualifier.

The cellcounter takes two optional parameters one to use a user
supplied row/family/qualifier string to use in the report and
second a regex based or prefix based row filter to restrict the
count operation to a limited subset of rows from the table.